Tech Roundup: Micrsoft offer $40 upgrade to Windows 8, company take $6.2bn hit on purchase of aQuantive, Twitter sets new record during Euro 2012 Final

- Microsoft announce $40 upgrade to Windows 8
- Microsoft take a $6.2bn hit on purchase of online advertising company aQuantive
- Twitter set new record during Euro 2012 Final, with over 15,000 tweets per second after Spain's fourth goal